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加速度和速度都是矢量。
Acceleration and velocity are both vectors.
《牛津词典》
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youdao
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youdao
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youdao
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那种矢量就叫做”零矢量“。
That vector is called a "null vector".
youdao
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那我们怎么得到这单位矢量呢？
Now, how do we get this unit vector?
youdao
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图像分为两类：位图和矢量图。
The two types of images are: bitmap and vector.
youdao
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图1是矢量数据和属性表的示例。
Figure 1 provides an example of vector data and an attribute table.
youdao
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我断言，这个位置矢量在平面上。
Well, I claim that the position vector is in the plane.
youdao
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假设有一矢量，在三维空间中。
I have a vector which is in three-dimensional space.
youdao
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可伸缩的矢量图形（SVG）。
Scalable vector graphics (SVGs).
youdao
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第二个是初始矢量字节数组。
The second is the initial vector byte array.
youdao
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接下来要处理的是矢量图形。
The next thing to play with is vector graphics.
youdao
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这个字节数组称为初始矢量(IV)。
This byte array is called an initial vector (IV).
youdao
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然后导入刚才的角色矢量图。
Then import the character vector from Illustration as a smart object.
youdao
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速率保持不变，但速度矢量会发生变化。
The speed is not changing, but the velocity vector is changing.
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因此，路径的概念对矢量作图非常重要。
Therefore, a concept of path is fundamental to vector drawings.
youdao
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我们都见过…这就是矢量。
We all have seen... this is a vector.
youdao
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就是我们所说的速度矢量。
OK, that's what we call the velocity vector.
youdao
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还有一个有用的概念就是轨道的单位矢量。
Now, another useful notion is the unit vector to the trajectory.
youdao
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此网站为矢量创作者提供了不少免费资源。
This website includes many free design resources for the vector artist.
youdao
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一个与半径垂直的矢量。
It's a vector, perpendicular.
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角动量的矢量会怎样呢？
What will the angular momentum vector do?
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因此我们叫它速度矢量。
And so, that's called the velocity vector.
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来看看位置矢量的改变。
And, we look at how the position vector changes.
youdao
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此驱动程序提供了大量用于创建矢量的选项。
This driver program comes with a lot of options for creating vectors.
youdao
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这意味着，我们也许需要一个矢量来表示它。
That means actually we should use a vector maybe to think about this.
youdao
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记住它，这是个矢量。
Remember this-- this is a vector.
youdao
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好，这就是速度矢量。
OK, so that's the velocity vector.
youdao
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矢量c的方向是什么？
What is the direction of the vector?
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